* eval.c (scm_promise_p), list.c (scm_append_x, scm_reverse_x),

	* eval.c (scm_promise_p), list.c (scm_append_x, scm_reverse_x),
	symbols.c (scm_symbol_to_string), vports.c (scm_make_soft_port):
	Change R4RS references to R5RS.

	* guile-snarf.awk.in: Fixes so that (i) blank lines in the
	docstring source are correctly reproduced in the output (ii)
	we don't anymore get occasional trailing quotes.  Also reorganized
	and commented the code a little.

	* scmsigs.c (scm_raise), throw.c (scm_throw): Docstring format
	fixes.

	* new-docstrings.texi, posix.texi, scheme-control.texi,
	scheme-data.texi, scheme-debug.texi, scheme-evaluation.texi,
	scheme-io.texi, scheme-memory.texi, scheme-procedures.texi:
	Automatic docstring updates (mostly argument name updates and
	blank lines).

	* scheme-modules.texi: Change double hyphens to single.

	* scheme-control.texi (Lazy Catch): Completed.

	* posix.texi (Network Databases and Address Conversion): New
	subsubsection `IPv6 Address Conversion'.